Carb Adapter - 4150 to 4500 Flange

The Wilson Manifolds Carb Adapter – 4150 to 4500 Flange is a precision-engineered carburetor adapter designed to bridge incompatible manifold flanges on performance and classic vehicles. This aluminum adapter converts 4150-series carburetor flanges to 4500-series manifold patterns, enabling flexible fuel-system configuration on engine swap projects, restoration builds, and high-performance street applications where original equipment spacing doesn't match aftermarket components.

Measuring 1.5 inches thick and weighing 1.19 pounds, this adapter provides a substantial mechanical interface while remaining compact enough for tight engine bay installations. The open design maintains full port diameter alignment between carburetor and manifold, avoiding flow restriction or vacuum signal loss. Black anodized finish protects the aluminum substrate against corrosion and heat cycling—critical on engines where underhood temperatures exceed 200°F continuously. The adapter's precision machining ensures flush seating and proper gasket compression, eliminating air leaks that compromise idle quality and cold-start performance.

This adapter is essential for builders combining modern four-barrel carburetors (Holley, Edelbrock, or Demon models using 4150 flanges) with manifolds originally designed for square-bore or Dominator-pattern carburetor spacing. Engine swaps, carburetor upgrades, and vintage vehicle restorations frequently encounter flange mismatches; a quality adapter solves this without modifying irreplaceable manifolds. The one-piece construction eliminates the reliability issues associated with stacked spacers, which can loosen under vibration or thermal expansion.

Wilson Manifolds is recognized within the carburetor and intake manifold sector for producing dimensionally accurate, durable adapters that perform consistently across street, strip, and marine applications. This 4150-to-4500 flange converter represents a straightforward, bolt-on solution for fuel system flexibility without compromising engine management or performance characteristics.